<%--
  Created by IntelliJ IDEA.
  User: 张轩豪
  Date: 2025/3/18
  Time: 15:00
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>


<%@ taglib prefix="c" uri="jakarta.tags.core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
用户名：<%=request.getAttribute("username")%><><br/>
密  码：<%=request.getAttribute("password")%><br/>
<hr/>
使用EL:<br/>
用户名：${username}<br/>
密 码：${password}<br/>

stu对象:
ID:${s.id}
学号：${s.num}
姓名：${s.name}



a是否为空：${empty a} <br/>
b是否为空：${empty b}

</body>
</html>
